Preparation method of water-based UV curing resin
A curing resin, water-based technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problem of little application research, and achieve the effects of good stability, fast curing speed and high flexibility
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Embodiment 1
[0043] The preparation method of the water-based UV curable resin described in the present embodiment 1 is made up of the following steps:
[0044] (1) Introducing hydroxyl groups into ricinoleic acid to produce castor oil-based polyols
[0045] Add 300 g of ricinoleic acid and 105 g of 1,3,5-pentanetriol into a 3000 mL reaction device equipped with a constant pressure dropping funnel, reflux condenser, thermometer and electric stirrer, raise the temperature to 50°C, and react for 1.5 hours. After the esterification reaction is completed, castor oil-based polyols are obtained.
[0046] (2) Introducing hydrophilic groups into castor oil-based polyols
[0047] Add 180 g of trimellitic anhydride into the castor oil-based polyol reaction device, keep the temperature at 65° C. for 2 hours, and then lower the temperature to 40° C.
[0048] (3) Preparation of oligomers
[0049]The product prepared in step (2) was heated up to 100°C, dehydrated under reduced pressure for 0.5 hours,...
Embodiment 2
[0053] The preparation method of the water-based UV curable resin described in the present embodiment 2 is made up of the following steps:
[0054] (1) Introducing hydroxyl groups into ricinoleic acid to produce castor oil-based polyols
[0055] Add 300 g of ricinoleic acid and 120 g of 1,3,5-pentanetriol into a 3000 mL reaction device equipped with a constant pressure dropping funnel, reflux condenser, thermometer and electric stirrer, raise the temperature to 55°C, and react for 1.8 hours. After the esterification reaction is completed, castor oil-based polyols are obtained.
[0056] (2) Introducing hydrophilic groups into castor oil-based polyols
[0057] Add 200 g of trimellitic anhydride into the castor oil-based polyol reaction device, keep it at 70° C. for 2.5 hours, and then lower the temperature to 43° C.
[0058] (3) Preparation of oligomers
[0059] Warm up the product prepared in step (2) to 105°C, dehydrate under reduced pressure for 0.5 hours, then cool down t...
Embodiment 3
[0063] The preparation method of the water-based UV curable resin described in the present embodiment 3 is made up of the following steps:
[0064] (1) Introducing hydroxyl groups into ricinoleic acid to produce castor oil-based polyols
[0065] Add 300 g of ricinoleic acid and 135 g of 1,3,5-pentanetriol into a 3000 mL reaction device equipped with a constant pressure dropping funnel, reflux condenser, thermometer and electric stirrer, raise the temperature to 60°C, and react for 2 hours. After the esterification reaction is completed, castor oil-based polyols are obtained.
[0066] (2) Introducing hydrophilic groups into castor oil-based polyols
[0067] Add 210 g of trimellitic anhydride to the castor oil-based polyol reaction device, keep the temperature at 75° C. for 3 hours, and then lower the temperature to 45° C.
[0068] (3) Preparation of oligomers
[0069] The product prepared in step (2) was heated up to 105°C, dehydrated under reduced pressure for 0.5 hours, th...
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Abstract
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